ActiveSync was unable to reach the server (80072f78)

Posted on 2006-05-05
Last Modified: 2011-08-18
I've recently reinstalled my SBS installation and I've wiped my SmartPhone running WM5 and I'm not trying to sync it with Exchange via USB cable connected to my workstation. When AS comes to sync a specific item, i.e. Calendar, a red exclamation mark appears next to the AS logo and after a few seconds the following error message appears:

ActiveSync was unable to reach the server. Check that the server address and proxy settings are correct.

Support Code:80072f78

I've checked the server address as specified and it is pingable from my workstation. Nothing in Windows Firewall on my XP Workstation has changed in the past few weeks, and the server was only reinstalled a few days ago. Both computers are connected via a switch, so it's not a hardware firewall issue. I can however use Outlook and OWA via the WorkStation no problem using RWW in IE. I can also connect to OWA via the Internet using RWW.

The error code on the MS website points to this:

I've tried point 1 which was the first thing I checked, tried setting it to auto detect proxy settings too, but still the problem persists.

In my opinion, it's a server issue, but I'm not sure what! My server is running SBS SP1 and Exchange SP2.
Question by:DReade83

    Author Comment

    I'm not sure if this is the problem, but in IE, if I go to, I'm prompted to login via the domain, then I get the following error message:

     The page cannot be displayed
    The page you are trying to reach cannot be retrieved.  

    Please try the following:

    Open the home page, and then look for links to the information you want.
    Click the Refresh button, or try again later.

    Click  Search to look for information on the Internet.
    You can also see a list of related sites.

    Error 501/505 - Not implemented or not supported
    Internet Explorer  

    Is this meant to do this?

    Author Comment

    Right, to add to the confusion, I've just managed to sync via GPRS no problem, so the problem is currently isolated to the USB connection. I have noticed though when connected to the USB, I'm not even prompted on the phone to enforce password policies, but I am when connected via GPRS.

    Any ideas?

    Author Comment

    My fault, it turns out I was using ActiveSync 4.2 Beta and by reinstalling 4.1 magically made the problem disappear! Thank you Microsoft!

    This question can be deleted, Sembee.

    Accepted Solution

    Closed, 500 points refunded.
    The Experts Exchange
    Community Support Moderator of all Ages

    Featured Post

    Free Trending Threat Insights Every Day

    Enhance your security with threat intelligence from the web. Get trending threat insights on hackers, exploits, and suspicious IP addresses delivered to your inbox with our free Cyber Daily.

    Join & Write a Comment

    Learn more about how the humble email signature can be used as more than just an electronic business card. When used correctly, a signature can easily be tailored for different purposes by different departments within an organization.
    Get an idea of what you should include in an email disclaimer with these Top 5 email disclaimer tips.
    In this video we show how to create a Resource Mailbox in Exchange 2013. We show this process by using the Exchange Admin Center. Log into Exchange Admin Center.: Navigate to the Recipients >> Resources tab.: "Recipients" is our default selection …
    The basic steps you have just learned will be implemented in this video. The basic steps are shown to configure an Exchange DAG in a live working Exchange Server Environment and manage the same (Exchange Server 2010 Software is used in a Windows Ser…

    731 members asked questions and received personalized solutions in the past 7 days.

    Join the community of 500,000 technology professionals and ask your questions.

    Join & Ask a Question

    Need Help in Real-Time?

    Connect with top rated Experts

    15 Experts available now in Live!

    Get 1:1 Help Now